# -*- coding: utf-8 -*-
import socket

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.bind(("127.0.0.1", 9999))

print ("Bind UDP on 9999")

while True:
    data, addr = s.recvfrom(1024)
    print ('receive from %s:%s' % addr)
    s.sendto(b'Hello ' + data, addr)
